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Imp Carb adjustment

IMP

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My 1404 Imp seems to lack power under moderate load. The vacuum advance seems to work ok, Points ok, But the plugs look kinda whiter than normal. Maybe the carb is too lean. The engine does not miss. Ive never adjusted the Carb after a friend rebuilt it for me a few years ago. Anyone know what screws to adjust to make the fuel/air mixture more rich? Any troubleshooting suggestions? I replaced all ignition parts and tuned up about a 100 hrs ago.
 

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IMP

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Site Supporter
Here is a schematic on the solex 28-32PDSIT-4 V4 carburetor if any ones interested. Also found some other useful links if you want it PM me.
 

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